Railway signaling



June` 30, '1931. c. A. BRQoKs ET AL ARAILWAY SIGNALING Filed Oct. 29. 1929 d.. h a r 1M VH @Jv/.f rL. ,7 l @E Q B M NQN IWI wm El mm QN @RW f E EMM m. l -Nv NN 1 m mv N m mw KN Dwlrm m m www @i .5m Nimm? M, Q @Wt Nr@ Q R O drayving.` lEach switchyF `controls a pair of vlfdatented June 30, 1931V` mannns-njnngoxs, oF SWISSVALE, AND

' Y embodyingou-r invention.`

15" "Referring to the drawing,V the referenceA A' therails adjacent o-nevend'of the section, yand* v v n n w y l mania. rELixAN; or' P1icifrsiiinten,fienivirf f sYLvANiA, AssIGNoRs'ro THE UNIoN'sWiTcr-rasieNALcoMrANm oriswissviipii, Y

PENNSYLVANIA; vcoiwciisri'rioiw QEIfENNsYLvnNinT i RAILWAY.'

sieNAifiN'G Application sied octobe empieza [serialy No..` @3,199.1`

Our-invention" relates to railway ysignal-y ing, Vand particularly to signaling for laf. stretch vof railvvay track adjacent its connec;

tionfxvitlra,passingsiding ,Y A One feature 4of our invention is Y,the provision offnfieans Jfor inter#coiit'riollingfopp0s A ing signals adjacentav passing siding by ap? inatic View showing one `form of apparatus characters lv and lL designatetherails of a stretch Y of railway track 'connected' with fraile-l1b and' 1,.respectively, :of aj siding Z` by means ofsvvitches'designated by the ref erenceY characters 'F'1 and F2, Vrespectively.

Rails 1 and l# of l stretchV Y lare dividedV :by ineans l of; insulated.' joints 2 vintoA sections .A5-B51 B-fGVCD and 'Each 'of these tracksecti'ons is Lprovided with a track ycircuitincluding/,1ra battery `fconnected across a relaydesignated .by the -refereneefcharacter R with a distinguishing exponent and co`nnected across the rails adjacentthe oppbsite i f l' encercliaracterL with distinguishing expor-v end of the section.

:nach of vai@ Switches'ii my beiauaiiy' operated .orinay be operated 'by anyy other suitable means.y vMeans for operatingthese vention,' and are hence nqtxshovvnj in fthe `'position only, and in a second positionvvhen the switch is in Vits reverse `positionfonly.

"FOP example, Contacislafandeo of switch@ connectlwith terrninals 12al and 20?,` respectively, When-the svvitchfisin-its norma-lipovsiti'on, fand Yconnect withteiininals 12? and j iv 45 QOvvhen the,switt'zh is in its reverse position. 4Signals designated by the reference char-I acier With* distinguishing,` exponents govf Y' over stretch Y to 'or from sidinff` :56'

Vern traiiic movements over stretch" Y, only,` or Z.. `Signals wie .more

and overn `efastbeiizid ments ver Streich 'n'i'yjtiit' is', i este? VZ, andsignals S4 and S6 govern. traffic nnove-V mentemsldlgZtestretch .Y'ifAsShowh in the ydrai'vinzgf` each efithese'signalsis of y the semaphore type' f vEach f Vthesig'i'i'al ,pair of f pole-changing.eiitacts i Which are.

closed in Aone position Whenthe arinofthe d fsigna-l' ris iii 'the stop position or in yany position betweenthe`lstop,position and Vthe vis'in thecaution o ivthe fprocee'dWQr any intermediate position.vv :For `example;4 ifconf-Q hof signal rSgis-'in the, stop position or? in .position between the stop and caiitic'in posii li'nfthe caution or `the mediate position;

izedr signal 'relays designated bytheirferf#r inents. VRelays L are controlledv bydn'ainfre. lays designated by therefereiic'e charaeterfH 'tants `7 and 8 cf'signal connect with lierininals-G and5, respec'tively,A when thefarin fcaution position-:and which are closedin asecondposition when thev arm ofthe'signal 'Signalsisiandfsi rewarded byf' poi *f with distinguishingexpcnents, 'and wlih f 'maybe controlledjnf any suitable mannei-, i y

55"`v' -catedin atraindispatcheiJs/oiiice. `'Ifilen'ieansvv E forcontrollingrelaysHfornino partofQuii,

suchgffo'r example, as byineans offleverslo#v lpresent finv'entioi'ifand aref, thereforenot j shown Yin Vthe'V drawing,

Relays L2 and L?"areaalsoicontiiolled'by b (iirrent 'for energizing relay'fL2^ is supplied by battery Q1 loeate'diadjacent' signal S?, r i .fstaeeea si@ en-eee@ wie# lno I f the pole-'changing contacts'o'f svvitchesFgland by track relaysRfa'nd by the polechanging contacts of signals S3 or', S5;Irespecti've1y;V y. whensvvitchefs F1 andlzL are'finA the y'no rm al' t V .f 'ff 'aff ,95'l for energizing relay L? is ,Supplied Gti " for relay ries with batteries Q1 and Q2 to prevent shortcircuit-ing these batteries under certain conditions which will be hereinafter explained.

As shown in the drawing, all parts are in their normal condition, that is, each of the track sections is unoccupied, each relay H is de-energized, each relay L is cle-energized, each signal S is indicating stop, and each of the switches F is in its norma-l position.

We will now assume that the dispatcher desires to clear signal S7. He therefore encrgizes relay H2. Relay H2, upon b'econ'iin'g' energized, completes a circuit for relay L2 passing from battery Q1, through resistance N1, Contact 5-8 of signal S2, contact 211 of relay H1, contact .20120 of switch F1, contact 19--192 of switch F2, contact 182 ot relay H2, winding of relay L2, Contact 172 of relay H2, contact 16 of relay R1, contact 152#15 of switch F2, contact 14 of relay R3, contact 13 of relay R2, contact 1.2-12a of switch F1, contact 11 of relay R1, contact 101 of relay H1, wire 9, and contact 7-6 of signal S3 back to battery Q1. Relay L2 is energized in the reverse direction by this circuit, vcausing the arm of signal S7 to be operated to the caution position by its circuit passing from battery Q2, through contact 22 ot relay L2, and the mechanism of signal S7 back to battery Q2.

If the arm of signal 'S2 is now moved to its caution or its proceed position, polechanging contacts 7 and 8 of signal S3 will be moved to connect with terminals 5 and 1, and current supplied by battery Q1 will, therefore, now flow in the opposite direction through the circuit already traced for relay L2, causing relay L2 to become energized in the normal direction. The arin o1 signal S7 will then be operated to its proceed position by its circuit passing from battery Q52, through contacts 22 and 23 of relay L2, and the mechanism of signal S7 back to battery If, when the arm of signal S7 is in its caution or its proceed position, an eastbound train should overrun signal S1, not stopping until it had entered section A-B, the circuit already traced for relay L2 would be opened at contact 11 of relay R1, causing relay L2 to be cle-energized and thearin of signal VS7 to, therefore, be returned to its stop7 position. A westbound train vpassing signal S7 at caution or proceed would similarly cause' the arm of signal S7 to be returned to its stop position by opening contact 16 of relay R4. The westbound train then continuing toward point A would keep relay L2 de-energized by cle-energizing relays Rf, R2 and R1, successively.

lVe will next assu-me that switch F1 is in' its reverse position, and that switch F2 is in its normal position, andthat the dispatcher again enerfrizes relay H2. A second Circuit L2 is thereby ucompleted passing from battery Q1, through resistance N1, contact 20b--2O of switch F1, contact 19-192 of switch F2, contact 182 of relay 112, winding of relay L2, contact 172 of relay H2, contact 16 oit relay R1 contact 152-15 oi' switch F2, contact 14 'of relay R2, contact 13 of relay R2, and contact 12-122 of switch F1 back to battery Q1. Relay L2 is now energized in the reverse direction, and hence the arm of signal S7 nieves to its caution position. 1f, now, an eastbound train enters section A-B, the circuit just traced for relay L2 will not be affected thereby, and hence signal S7 will continue to indicate caution 7e will now assume that all parts are again in their normal condition, and that the dispatcher then energiz'es relay H2, and that the arin oi? signal S1 is moved to its caution or its proceed position, causing the arm of signal S7 to again occupy its proceed position. 1v1-7e will further assume that the dispatcher then desires to return the arm of signal S7 to its stop position before a train arrives. He Atherefore cle-energizes relay H2,

causing the back contacts 177 and 18b of relay H2 to be closed. As long as the arm of signal S3 is in its caution or its proceed position or any intermediate position, a Circuit will be completed passing i'rom battery Q1, through resistance N1, contact 5--7 of `'signal S2, wire 9, contact 10b of relay H1, contact 11 oft relay R1, contact 12R- 12 of switch F1, contact 13 of relay R2, contact 11 of relay R2, contact 15j- 152 of switch F 2, contact 16 of relay R2, Contact 1171 o' relay H2, contact E28- 25 of signal S77, battery Q2, resistance N2, Contact 26--27 of signal S5, contact 18b of relay H2, contact 19a- 19 of switch F2, contact 20-202 o1 switch F1, contact 211 of relay H1, and contact 8 1 of signal S2 back to battery Q1.'

'lhe use of resistances N1 and N 2 prevents snort-circuiting of batteries Q1 and Q2 b y the circuit ust traced.

The control of signal S1 for eastbound moves is `similar to that already described .tor signal S7 for westbound moves, and will therefore be readily understood without further expianation. It is evident that if both switches F1 and F2 are reversed, or iff both relays H are energized ed with the use of only twoV line wires eXtending between these two signals. It is evident that signals yS2 and S2 can be similarly intercontrolled. n y

Although we have herein shown and` described only one torni 01TL apparatus embody;4

ilo

ing our invention, it i is. understood that i Various changes and modiications-maybe made therein within the scope ofthe appended claims vWithout departing from the spirit and scope of our invention. l A

I-Iaving thus described our invention, what we claim is: .Y

1. In combination, a stretch of railway track, a lsignal adjacent 4 one end of said stretch, a second signal adjacent,y the other end of said stretch, a main relay,"a second main relay, a 'signal relay, a second signal relay, a pole-changer, a second pole-changer, a circuit for said first signal, relayincluding a front contact of said first main.. relay and a back contact of said second main relay las n well as said second pole-changer and a source of current and the winding of said lirst signal relay in series, a circuit for said second 'signal relay includingr 4a front contact of said second main relay and aback contact of l said first main relay aswell assaid first polechanger and a second vsource of current and the winding of said secondv signal relay in series, means controlled by said first, signal f relay for controlling saidy firstfsignal, and means controlled by said second signal relay for controlling said second signal.

a front Vcontactv of Asaid first main relay and 'well-as a source of currentand said normal switch contact, a circuit for saidsecond signal relay including a frontk contact of` said second main relay anda back Contact ofsaid vaback contact of said second mainrelay as 4,

first-,main relay as well as said normal switch i contact and a second source ofcurrent, a sec-v ond circuit for said second signalrelay vin-` cluding a frontv contact ofsaid second mainrelayv and said reverse vswitch contact and said secondi-source of. current, meansv controlled bysaid firstV signal relayfor controllingl said iirst signal, and means controlled by'saidsecond signal relay for controlling said second signal.

In testimony whereof weaflixour signa-" tures. i v y i v CHARLES A. BROOKS.

JOI-IN M. PELIKAN.

2. In combination, a stretch of railway track including a switch, a signal adjacent'j one end of said stretch, a second signalad-y relay, a second-,main relay, a pole-changer, a signal relay, a second signal relay, a normay switch contact closed wheny said switch is in its normal position only, a'reverse switch contact closedwhen said switch is in its reverse position only, a circuit :for said iirst signal relay including a front contact of said f first main relay and yaback contact of said cuit for said second signalrelay including a i y changer and a secondsource of" current, a

secondcircuit for said secondvsi'gnal relay in- Y cluding afront contactof said second main relay and said reverse-switch Contact and: 'A

Vjacent the other end of said stretch, a main f V*second main relay aswell as a' source of current-and said normal switch contact, 'a cirsaid second sourceiof current, means vcona trolled by said first signal relay for controlling said first signal, and means controlled by sai-d secondvsignal relay for controlling said second signal. Y v

3. In combination, a stretch 4of lrailway track including a switch, a signal adjacent one end of said stretch, a second signaliadja- Y cent the other end of saidl stretch, a main re lay, a second main relay, a signal relay, a

acircuit for said rst signal relay including y second signal relay, a-jnormalswitch contact, A

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